Damping of giant resonances in asymmetric nuclear matter

Abstract

The giant collective modes in asymmetric nuclear matter are investigated within a dynamic relaxation time approximation. We derive a coupled dispersion relation and show that two sources of coupling appear: (i) a coupling of isoscalar and isovector modes due to different mean-fields acting and (ii) an explicit new coupling in asymmetric matter due to collisional interaction. We show that the latter one is responsible for a new mode arising besides isovector and isoscalar modes.

Varenna conference proceedings

References in corpus (2)

• Effect of large neutron excess on the dipole response in the region of the Giant Dipole Resonance
• Damping rates of hot Giant Dipole Resonances

Cited by in corpus (2)

• Dynamical local field, compressibility and frequency sum rules for quasiparticles
• Quasiparticle parameterization of meanfields, Galilei invariance and universal conserving response functions